Comment 6 for bug 1318770

For nova list, anyway you are getting the username of the each instance with it ID. You don't have to do any thing else.

Check Below :

ritesh@ritesh-ThinkCentre-M92p:~/devstack$ nova list
+--------------------------------------+--------+--------+------------+-------------+-------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+--------+--------+------------+-------------+-------------------+
| f058d03a-de2d-4eba-b3f4-8c074e76e17b | RITESH | ACTIVE | - | Running | public=172.24.4.3 |
+--------------------------------------+--------+--------+------------+-------------+-------------------+

The flow of calling api for nova list and nova usage list is different.

What username you want to put in which command . For a tenant , there are mulitpile users. So tenant is defined by tenant's name , not by any username.

Please check the openstach dasboard , overview usage.